True/ False: Particles of matter are always in motion.
True
5
The model represents one molecule of hydrazine. The black spheres represent nitrogen, the white spheres represent hydrogen. Based on this model, what is the atomic composition?
2 atoms of nitrogen and 4 atoms of hydrogen
15
?
solid & liquid
5
True/ False: Temperature is the average kinetic energy of a substance.
True
5
The state of matter of a material depends on its ___________.
temperature
5
True/ False: Shape is a physical property.
True
5
True/ False: Density is an example of a chemical property.
False- physical property
5
True/ False: Chemical reactions can eithe release more energy that they absorb or absorb more energy than they release, depending on the reaction.
True
5
?
Add another hydrogen atom to the product molecule that has one hydrogen atom
10
True/ False: Mass is a chemical property.
False- physical property
10
True/ False: The state of matter is a physical property.
True
5
True/ False: Matter can be classified based on chemical properties.
True
10
True/ False: Malleability is a physical property.
True
5
True/ False: When a substance undergoes a physical change, its identity does not chage.
True
10
What is the formula for density?
D= m/v
15
What is the law of conservation of mass?
The mass before a reaction is the same as the total mass after a reaction.